docs: def _add_qualified_edge_helper(self, u, v, relation, annotations, subject_modifier, object_modifier) -> str:
          """Add a qualified edge from the internal aspects of the parser."""
          return self.graph.add_qualified_edge(
              u,
              v,
              relation=relation,
              evidence=self.control_parser.evidence,
              citation=self.control_parser.citation.copy(),
              annotations=annotations,
              subject_modifier=subject_modifier,
              object_modifier=object_modifier,
              **{LINE: self.get_line_number()}
          )